Return type double-conveying-station device

Abstract

The utility model relates to the technical field of double-conveying-station devices, and discloses a return type double-conveying-station device which comprises a main conveying structure, a jacking and transferring structure, a first station assembly and a second station assembly, the main conveying structure is used for conveying trays, and the jacking and transferring structure is used for jacking the trays and transferring the trays to the first station assembly or the second station assembly; the first station assembly comprises a first conveying belt, the second station assembly comprises a second conveying belt, the jacking and transferring structure comprises a transferring and conveying structure and a jacking device, the jacking device is used for jacking a tray to be flush with the first conveying belt and the second conveying belt, and the transferring and conveying structure is used for conveying the tray to the first conveying belt or the second conveying belt. Therefore, operation of workers is not affected by the main conveying structure, machining operation is facilitated, meanwhile, the double stations do not affect each other, alternate operation is not needed, the trays can be reversely conveyed to the main conveying structure when the first station assembly or the second station assembly completes machining, and the operation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model patent relates to the technical field of double conveying station devices, specifically, to a return type double conveying station device. Background Art

[0002] With the development of modern machinery manufacturing and productivity, most factories have gradually used production lines to manufacture products. The various transport structures in the production lines are connected to each other, and the products flow on the various transport structures. The conveying equipment includes a conveying structure, which transfers the pallets of the conveyor line to the workstation through the conveying structure.

[0003] For example, a prior patent with authorization announcement number 209601558U discloses a pallet conveyor line, including a base body, two cylinder blocking blocks are fixedly installed on the upper outer surface of the base body near the middle, a cylinder push plate is provided on one side of the cylinder blocking block, a roller is movably installed on the inner side surface of the cylinder blocking block near the upper end, a pallet is provided on the lower outer surface of the roller, a motor is fixedly installed on the lower outer surface of the base body near the front end, and synchronous belts are movably installed on both sides of the motor, a cylinder lifting plate is fixedly installed on the lower outer surface of the cylinder blocking block, and the two cylinder blocking blocks are arranged in a straight line in the horizontal direction.

[0004] In the prior art, a double-cylinder cycle lift is used to switch the pallet, thereby realizing alternating operation of two workstations. However, the lifted pallet is still very close to the conveyor line, and the operator must also be close to the conveyor line, which affects the safety of the operation. At the same time, due to the limitation of the conveyor line, the working space of the pallet product is limited, which is not convenient for product processing. Utility Model Content

[0005] The utility model aims to provide a return-type double-conveying station device, aiming to solve the problem of inconvenient processing of conveyor line pallet products in the prior art.

[0006] The utility model is implemented as follows: a return-type double-conveying station device comprises a main conveying structure, a lifting and transferring structure, a first station assembly and a second station assembly, wherein the main conveying structure is used to convey pallets, and the lifting and transferring structure is used to lift the pallets and transfer them to the first station assembly or the second station assembly; the first station assembly comprises a first conveyor belt, and the second station assembly comprises a second conveyor belt, the lifting and transferring structure is located between the first conveyor belt and the second conveyor belt, and the first conveyor belt and the second conveyor belt are arranged above the main conveying structure; the lifting and transferring structure comprises a transfer conveying structure and a lifter, and the lifter is used to lift the pallet to be arranged flush with the first conveyor belt and the second conveyor belt, and the transfer conveying structure is used to convey the pallet to the first conveyor belt or the second conveyor belt.

[0007] Furthermore, the first workstation assembly includes a first motor, a first active roller and a first driven roller, the first active roller and the first driven roller are respectively mounted on both ends of the first conveyor belt, the first motor is used to drive the first active roller to rotate, and the first active roller is used to drive the first conveyor belt to a conveying state; the first motor is used to drive the first active roller forward or reverse.

[0008] Furthermore, the first workstation assembly includes two first frame bars and two first baffles, the two first frame bars are arranged in a corresponding manner at intervals, the first frame bars are extended in a direction away from the main conveying structure, the two ends of the first active roller are respectively connected to the two first frame bars, and the two ends of the first driven roller are respectively connected to the two first frame bars; the two first baffles are arranged in a corresponding manner at intervals, the first baffle and the first frame bar are assembled in an upper and lower overlapping manner, and a first conveying area is formed above the first conveyor belt, and the first conveying area is located between the two first baffles.

[0009] Furthermore, the first station assembly includes a first baffle rod, both ends of which are respectively arranged to be docked with the two first baffle plates, and the first baffle rod is used to prevent the pallet from leaving the first conveyor belt.

[0010] Furthermore, the first workstation assembly includes a first initial detector and a first final detector, and the first initial detector and the first final detector are respectively installed at two ends of the first baffle, the first initial detector is used to detect the entry of the tray, and the first final detector is used to trigger a stop signal.

[0011] Furthermore, the first workstation assembly includes a first transmission chain and a first frame, the first active roller has a first roller gear, the first motor has a first motor gear, and the first transmission chain is meshed with the first motor gear and the first roller gear respectively; the first motor is assembled with the first frame, the first frame has a plurality of first frame slots, the first frame slots are longitudinally extended, the first motor has a plurality of first machine columns, each of the first machine columns is arranged in a one-to-one correspondence with each of the first frame slots, and the first machine column passes through the first frame slot, and a fastener is sleeved on the first machine column, and the fastener is used to fix the first machine column.

[0012] Furthermore, the first workstation assembly includes a first supporting plate, which is arranged horizontally, and the two ends of the first supporting plate are respectively connected to the two first frame bars, and the first supporting plate has an upward first supporting surface, and the first supporting surface is arranged flat and in contact with the first conveyor belt, and the first supporting surface is used to support the first conveyor belt.

[0013] Furthermore, the return-type double-conveying workstation device includes two of the jacking and transfer structures, two of the first workstation assemblies and two of the second workstation assemblies, and the two of the jacking and transfer structures, the two of the first workstation assemblies and the two of the second workstation assemblies are arranged in a one-to-one correspondence; along the conveying direction of the main conveying structure, the two of the first workstation assemblies are arranged in a corresponding arrangement, and the two of the second workstation assemblies are arranged in a corresponding arrangement.

[0014] Furthermore, an inter-station area is formed between the two first-station assemblies, and the return-type double-conveyor station device includes a display screen and a screen fixing rod, the upper part of the screen fixing rod is assembled with the display screen, and the lower part of the screen fixing rod is embedded in the inter-station area; the display screen is arranged above the first-station assembly, and the two ends of the display screen extend to the two first-station assemblies respectively.

[0015] Furthermore, the return-type double-conveyor station device includes a stopping structure, which is assembled with the main conveying structure, and is arranged correspondingly to the lifting and transferring structure. The stopping structure is used to stop the pallet conveyed by the main conveying structure and to stop the pallet from stopping the lifting and transferring structure.

[0016] Compared with the prior art, the utility model provides a return-type double-conveyor station device. During operation, the main conveying structure conveys the pallet to the jacking transfer structure, and the jacking transfer structure lifts the pallet until it is flush with the first conveyor belt and the second conveyor belt. Based on the job allocation requirements, the pallet is transferred to the first conveyor belt or the second conveyor belt, and the staff processes the products on the pallet on the first station assembly or the second station assembly. After completion, the product is transported to the jacking transfer structure by the first conveyor belt or the second conveyor belt, and the jacking transfer structure lowers the pallet to the main conveying structure, and the pallet is transported to other stations or completed processing through the column conveying structure; in this way, the staff's operation is not affected by the main conveying structure, which is convenient for processing operations. At the same time, the double stations do not affect each other, and there is no need to operate alternately. After the first station assembly or the second station assembly completes processing, the pallet can be reversely transported to the main conveying structure, which greatly improves operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the return-type double-transporting station device provided by the utility model;

[0018] Figure 2 It is a three-dimensional schematic diagram of the first station assembly of the return-type double-transport station device provided by the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the first station assembly of the return-type double-transport station device provided by the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0022] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] Reference Figure 1-3 As shown, it is a preferred embodiment provided by the utility model.

[0024] The return-type double-conveying station device includes a main conveying structure 1, a lifting and transferring structure 2, a first station assembly 3 and a second station assembly 4. The main conveying structure 1 is used to convey the pallet, and the lifting and transferring structure 2 is used to lift the pallet and transfer it to the first station assembly 3 or the second station assembly 4; the first station assembly 3 includes a first conveyor belt 31, and the second station assembly 4 includes a second conveyor belt. The lifting and transferring structure 2 is located between the first conveyor belt 31 and the second conveyor belt, and the first conveyor belt 31 and the second conveyor belt are arranged above the main conveying structure 1; the lifting and transferring structure 2 includes a transfer conveying structure and a lifter, the lifter is used to lift the pallet until it is flush with the first conveyor belt 31 and the second conveyor belt, and the transfer conveying structure is used to convey the pallet to the first conveyor belt 31 or the second conveyor belt.

[0025] In the above-mentioned return-type double-conveyor station device, when in operation, the main conveying structure 1 conveys the pallet to the jacking transfer structure 2, and the jacking transfer structure 2 lifts the pallet until it is flush with the first conveyor belt 31 and the second conveyor belt. Based on the work allocation requirements, the pallet is transferred to the first conveyor belt 31 or the second conveyor belt, and the staff processes the products on the pallet on the first station assembly 3 or the second station assembly 4. After completion, the first conveyor belt 31 or the second conveyor belt transports the product to the jacking transfer structure 2, and the jacking transfer structure 2 lowers the pallet to the main conveying structure 1, and the pallet is transported to other stations or completed processing through the column conveying structure; in this way, the staff's work is not affected by the main conveying structure 1, which is convenient for processing operations. At the same time, the double stations do not affect each other, and there is no need to operate alternately. After the first station assembly 3 or the second station assembly 4 completes the processing, the pallet can be reversely transported to the main conveying structure 1, which greatly improves the work efficiency.

[0026] The first station assembly 3 includes a first motor 32, a first active roller 37 and a first driven roller 38. The first active roller 37 and the first driven roller 38 are respectively mounted on both ends of the first conveyor belt 31. The first motor 32 is used to drive the first active roller 37 to rotate, and the first active roller 37 is used to drive the first conveyor belt 31 to be in a conveying state.

[0027] In this way, the driving force is outputted to the first active roller 37 through the first motor 32, and the first active roller 37 drives the first conveyor belt 31 to be in a conveying state, so as to realize the transfer of the pallet from the jacking transfer structure 2 to the first conveyor belt 31. With the cooperation of the first active roller 37 and the first driven roller 38, the support and assembly of the first conveyor belt 31 are realized.

[0028] The first motor 32 is used to drive the first active roller 37 forward or reversely; in this way, when driven forward, the pallet is separated from the lifting transfer structure 2 and transferred to the first conveyor belt 31, and when driven reversely, the first conveyor belt 31 conveys the pallet in the reverse direction to the lifting transfer structure 2, thereby realizing automatic reception of pallets and automatic output of processed products.

[0029] The first station assembly 3 includes two first frame bars 33 and two first baffles 34. The two first frame bars 33 are arranged in a corresponding manner at intervals. The first frame bars 33 are extended in a direction away from the main conveying structure 1. The two ends of the first active roller 37 are respectively connected to the two first frame bars 33, and the two ends of the first driven roller 38 are respectively connected to the two first frame bars 33. The two first baffles 34 are arranged in a corresponding manner at intervals. The first baffles 34 and the first frame bars 33 are assembled in an upper and lower overlapping manner. A first conveying area is formed above the first conveyor belt 31, and the first conveying area is located between the two first baffles 34.

[0030] Under the action of the two first frame bars 33, the first active roller 37 and the first driven roller 38 are assembled; under the action of the two first baffles 34, they play a blocking role to prevent the pallet from accidentally leaving the first conveyor belt 31, thereby improving the transportation safety.

[0031] The first station assembly 3 includes a first baffle rod, both ends of which are respectively connected to the two first baffle plates 34, and the first baffle rod is used to prevent the pallet from detaching from the first conveyor belt 31; in this way, under the action of the first baffle rod, the pallet is prevented from detaching from the first conveyor belt 31 due to inertia, thereby preventing the pallet from being transported away from the first conveyor belt 31.

[0032] The first station assembly 3 includes a first initial detector and a first final detector, which are respectively arranged at two ends of the first baffle 34. The first initial detector is used to detect the entry of the tray, and the first final detector is used to trigger a stop signal.

[0033] Under the action of the first initial detector, the pallet entering the first conveyor belt 31 is detected to ensure the normal transportation of the pallet. When the first final detector detects the pallet, a stop signal is triggered and the first motor 32 stops providing driving force. At this time, the pallet is transported to the position for processing.

[0034] The first workstation assembly 3 includes a first transmission chain 35 and a first frame 36, the first active roller 37 has a first roller gear, the first motor 32 has a first motor 32 gear, and the first transmission chain 35 is meshed with the first motor 32 gear and the first roller gear respectively; the first motor 32 is assembled with the first frame 36, the first frame 36 has a plurality of first frame slots, the first frame slots are longitudinally extended, the first motor 32 has a plurality of first machine columns, each first machine column is arranged in a one-to-one correspondence with each first frame slot, and the first machine column passes through the first frame slot, the fastener is sleeved on the first machine column, and the fastener is used to fix the first machine column.

[0035] In this way, with the cooperation of each first frame slot and the first machine column, the installation position of the first motor 32 can be adjusted to ensure the power transmission of the first transmission chain 35.

[0036] The first workstation assembly 3 includes a first supporting plate 39, which is arranged horizontally. Both ends of the first supporting plate 39 are respectively connected to the two first frame strips 33. The first supporting plate 39 has an upward first supporting surface, which is flatly arranged against the first conveyor belt 31, and is used to support the first conveyor belt 31.

[0037] Under the action of the first bearing plate 39, the bearing strength of the first conveyor belt 31 is enhanced to ensure support for the pallet and the products on the pallet, thereby ensuring the transportation of the pallet.

[0038] The return-type double-conveying station device includes two jacking and transfer structures 2, two first station assemblies 3 and two second station assemblies 4. The two jacking and transfer structures 2, the two first station assemblies 3 and the two second station assemblies 4 are arranged in a one-to-one correspondence; along the conveying direction of the main conveying structure 1, the two first station assemblies 3 are arranged in a corresponding arrangement, and the two second station assemblies 4 are arranged in a corresponding arrangement.

[0039] In this way, one worker can perform processing operations on two first station assemblies 3, saving manpower and material resources, reducing production costs, and helping to improve processing efficiency.

[0040] An inter-station area is formed between the two first station assemblies 3. The return-type double-conveying station device includes a display screen 5 and a screen fixing rod 6. The upper part of the screen fixing rod 6 is assembled with the display screen 5, and the lower part of the screen fixing rod 6 is embedded in the inter-station area. The display screen 5 is arranged above the first station assembly 3, and both ends of the display screen 5 extend to the two first station assemblies 3 respectively.

[0041] Under the effect of the display screen 5 , the staff can output the processing operation instructions of the two first station assemblies 3 , and at the same time, realize the control of the first motor 32 , the lifting and transfer structure 2 and the main conveying structure 1 .

[0042] The return-type double-conveyor station device includes a stopping structure, which is assembled with the main conveying structure 1, and correspondingly arranged with the lifting and transferring structure 2. The stopping structure is used to stop the pallet conveyed by the main conveying structure 1 and stop the pallet from the lifting and transferring structure 2; in this way, under the action of the stopping structure, it is convenient to align the pallet with the lifting and transferring structure 2, thereby facilitating the lifting and transferring structure 2 to lift the pallet away from the main conveying structure 1, thereby realizing the transfer of the pallet.

[0043] The second workstation assembly 4 includes a second motor, a second active roller and a second driven roller. The second active roller and the second driven roller are respectively mounted on both ends of the second conveyor belt. The second motor is used to drive the second active roller to rotate, and the second active roller is used to drive the second conveyor belt to a conveying state.

[0044] In this way, the second motor outputs driving force to the second active roller, and the second active roller drives the second conveyor belt to be in a conveying state, so as to realize the transfer of the pallet from the lifting transfer structure 2 to the second conveyor belt. With the cooperation of the second active roller and the second driven roller, the support and assembly of the second conveyor belt are realized.

[0045] The second motor is used to drive the second active roller forward or reverse; in this way, when driven forward, the pallet is separated from the lifting transfer structure 2 and transferred to the second conveyor belt, and when driven reversely, the second conveyor belt transports the pallet in the reverse direction to the lifting transfer structure 2, thereby realizing automatic reception of pallets and automatic output of processed products.

[0046] The second workstation assembly 4 includes two second frame bars and two second baffles. The two second frame bars are arranged in a corresponding manner at intervals. The second frame bars are extended in a direction away from the main conveying structure 1. The two ends of the second active roller are respectively connected to the two second frame bars, and the two ends of the second driven roller are respectively connected to the two second frame bars; the two second baffles are arranged in a corresponding manner at intervals, and the second baffles and the second frame bars are assembled in an upper and lower overlapping manner. A second conveying area is formed above the second conveyor belt, and the second conveying area is located between the two second baffles.

[0047] Under the action of the two second frame bars, the second active roller and the second driven roller are assembled; under the action of the two second baffles, they play a blocking role to prevent the pallet from accidentally leaving the second conveyor belt, thereby improving the transportation safety.

[0048] The second workstation assembly 4 includes a second baffle rod, both ends of which are respectively connected to the two second baffle plates, and the second baffle rod is used to prevent the pallet from detaching from the second conveyor belt; in this way, under the action of the second baffle rod, the pallet is prevented from detaching from the second conveyor belt due to inertia, thereby preventing the pallet from being transported away from the second conveyor belt.

[0049] The second station assembly 4 includes a second initial detector and a second final detector, which are respectively arranged at two ends of the second baffle. The second initial detector is used to detect the entry of the tray, and the second final detector is used to trigger a stop signal.

[0050] Under the action of the second initial detector, the pallet entering the second conveyor belt is detected to ensure the normal transportation of the pallet. When the second final detector detects the pallet, a stop signal is triggered and the second motor stops providing driving force. At this time, the pallet is transported into place for processing.

[0051] The second workstation assembly 4 includes a second transmission chain and a second frame, the second active roller has a second roller gear, the second motor has a second motor gear, and the second transmission chain is meshed with the second motor gear and the second roller gear respectively; the second motor is assembled with the second frame, the second frame has a plurality of second frame slots, the second frame slots are longitudinally extended, the second motor has a plurality of second machine columns, each second machine column is arranged in a one-to-one correspondence with each second frame slot, and the second machine column passes through the second frame slot, the fastener is sleeved on the second machine column, and the fastener is used to fix the second machine column.

[0052] In this way, with the cooperation of each second frame slot and the second machine column, the installation position of the second motor can be adjusted to ensure the power transmission of the second transmission chain.

[0053] The second workstation assembly 4 includes a second bearing plate, which is arranged horizontally. The two ends of the second bearing plate are respectively connected to the two second frame bars. The second bearing plate has an upward second bearing surface, which is flatly arranged to contact the second conveyor belt, and the second bearing surface is used to support the second conveyor belt.

[0054] Under the action of the second bearing plate, the bearing strength of the second conveyor belt is enhanced, thereby ensuring support for the pallet and the products on the pallet, thereby ensuring the transportation of the pallet.

[0055] The return-type double-conveying station device includes two jacking and transfer structures 2, two second station assemblies 4 and two second station assemblies 4. The two jacking and transfer structures 2, the two second station assemblies 4 and the two second station assemblies 4 are arranged in a one-to-one correspondence; along the conveying direction of the main conveying structure 1, the two second station assemblies 4 are arranged in a corresponding arrangement, and the two second station assemblies 4 are arranged in a corresponding arrangement.

[0056] In this way, one worker can perform processing operations on two second workstation assemblies 4, saving manpower and material resources, reducing production costs, and helping to improve processing efficiency.

[0057] An inter-station area is formed between the two second station assemblies 4. The return-type double-conveyor station device includes a display screen 5 and a screen fixing rod 6. The upper part of the screen fixing rod 6 is assembled with the display screen 5, and the lower part of the screen fixing rod 6 is embedded in the inter-station area. The display screen 5 is arranged above the second station assembly 4, and both ends of the display screen 5 extend to the two second station assemblies 4 respectively.

[0058] Under the effect of the display screen 5 , the staff can output the processing operation instructions of the two second workstation assemblies 4 , and at the same time, realize the control of the second motor, the lifting and transfer structure 2 and the main conveying structure 1 .

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The return double-conveying station device is characterized by: It includes a main conveying structure, a lifting and transferring structure, a first workstation assembly and a second workstation assembly, the main conveying structure is used to convey pallets, the lifting and transferring structure is used to lift the pallet and transfer it to the first workstation assembly or the second workstation assembly; the first workstation assembly includes a first conveyor belt, the second workstation assembly includes a second conveyor belt, the lifting and transferring structure is located between the first conveyor belt and the second conveyor belt, and the first conveyor belt and the second conveyor belt are arranged above the main conveying structure; the lifting and transferring structure includes a transfer conveying structure and a lifter, the lifter is used to lift the pallet until it is flush with the first conveyor belt and the second conveyor belt, and the transfer conveying structure is used to convey the pallet to the first conveyor belt or the second conveyor belt.

2. The return-type dual-conveying station device according to claim 1, characterized in that: The first workstation assembly includes a first motor, a first active roller and a first driven roller. The first active roller and the first driven roller are respectively mounted on both ends of the first conveyor belt. The first motor is used to drive the first active roller to rotate, and the first active roller is used to drive the first conveyor belt to a conveying state. The first motor is used to drive the first active roller forward or reverse.

3. The return-type dual-transport station device according to claim 2, characterized in that: The first workstation assembly includes two first frame bars and two first baffles, the two first frame bars are arranged in a corresponding manner at intervals, the first frame bars are extended in a direction away from the main conveying structure, two ends of the first active roller are respectively connected to the two first frame bars, and two ends of the first driven roller are respectively connected to the two first frame bars; the two first baffles are arranged in a corresponding manner at intervals, the first baffle and the first frame bar are assembled in an upper and lower overlapping manner, a first conveying area is formed above the first conveyor belt, and the first conveying area is located between the two first baffles.

4. The return-type dual-transport station device according to claim 3, characterized in that: The first station assembly includes a first baffle rod, two ends of which are respectively arranged to be butted against the two first baffle plates, and the first baffle rod is used to prevent the pallet from leaving the first conveyor belt.

5. The return-type dual-transport station device according to claim 3, characterized in that: The first workstation assembly includes a first initial detector and a first final detector, which are respectively arranged at two ends of the first baffle, the first initial detector is used to detect the entry of the tray, and the first final detector is used to trigger a stop signal.

6. The return-type dual-conveying station device according to any one of claims 2 to 5, characterized in that: The first workstation assembly includes a first transmission chain and a first frame, the first active roller has a first roller gear, the first motor has a first motor gear, and the first transmission chain is meshed with the first motor gear and the first roller gear respectively; the first motor is assembled with the first frame, the first frame has a plurality of first frame slots, the first frame slots are longitudinally extended, the first motor has a plurality of first machine columns, each of the first machine columns is arranged in a one-to-one correspondence with each of the first frame slots, and the first machine column passes through the first frame slot, a fastener is sleeved on the first machine column, and the fastener is used to fix the first machine column.

7. The return-type double-conveying station device according to any one of claims 3 to 5, characterized in that: The first workstation assembly includes a first supporting plate, which is arranged horizontally. The two ends of the first supporting plate are respectively connected to the two first frame bars. The first supporting plate has an upward first supporting surface, which is arranged flat and in contact with the first conveyor belt. The first supporting surface is used to support the first conveyor belt.

8. The return-type double-conveying station device according to any one of claims 1 to 5, characterized in that: The return-type double-conveying workstation device includes two of the jacking and transfer structures, two of the first workstation assemblies and two of the second workstation assemblies, and the two of the jacking and transfer structures, the two of the first workstation assemblies and the two of the second workstation assemblies are arranged in a one-to-one correspondence; along the conveying direction of the main conveying structure, the two of the first workstation assemblies are arranged in a corresponding arrangement, and the two of the second workstation assemblies are arranged in a corresponding arrangement.

9. The return-type dual-conveying station device according to claim 7, characterized in that: An inter-station area is formed between the two first-station assemblies, and the return-type double-conveyor station device includes a display screen and a screen fixing rod, the upper part of the screen fixing rod is assembled with the display screen, and the lower part of the screen fixing rod is embedded with the inter-station area; the display screen is arranged above the first-station assembly, and the two ends of the display screen extend to the two first-station assemblies respectively.

10. The return-type dual-conveying station device according to any one of claims 1 to 5, characterized in that: The return-type double-conveyor station device includes a stopping structure, which is assembled with the main conveying structure and arranged correspondingly with the lifting and transferring structure. The stopping structure is used to stop the pallet conveyed by the main conveying structure and stop the pallet from the lifting and transferring structure.

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